[Apr 09, 2025] H12-821_V1.0 Exam Dumps - 100% Marks In H12-821_V1.0 Exam!
Exam Dumps Use Real HCIP-Datacom Dumps With 176 Questions!
Huawei H12-821_V1.0 certification exam is designed for professionals who have at least three years of experience in the field of network engineering. Candidates who pass H12-821_V1.0 exam will be able to demonstrate their expertise in a variety of areas, including network architecture, network security, and network management. certification is highly valued by employers and is recognized by industry professionals as a mark of excellence in the field of Datacom-Core Technology.
NEW QUESTION # 32
As shown in the following figure, a new AP is deployed In dual link MSB networking (load balancing mode).
Which AC will the connect to?
- A. AC2
- B. None
- C. AC1
- D. Random access
Answer: B
NEW QUESTION # 33
Which of the following statements regarding BGP route advertisement are false?
- A. All the BGP routes learned from all BGP peer will be advertised to other BGP peers.
- B. Only the routes learned from IGPs can be advertised to other BGP peers.
- C. By default, the routes learned from an IBGP peer will not be forwarded to other IBGP peers.
- D. Only the optimal routes preferred by BGP can be advertised to other BGP peers.
Answer: A
Explanation:
BGP does not advertise all routes learned from peers to other peers. By default, only the best (optimal) routes selected by BGP are advertised to other peers. Additionally, routes learned from IBGP peers are not forwarded to other IBGP peers unless a route reflector or confederation setup is used. The statement claiming all learned routes are advertised is false .
NEW QUESTION # 34
An engineer sets the CAPWAP heartbeat detection interval to 20 of the active link before an active/standby switchover occurs?
- A. 90s
- B. 75s
- C. 20s
- D. 60s
Answer: D
Explanation:
The CAPWAP heartbeat detection interval is typically multiplied by a predefined factor to determine the switchover time. For instance, in Huawei devices, a common default is three missed heartbeats before a switchover is triggered. With a detection interval of 20 seconds, the switchover occurs after 60 seconds (20 x
3). This ensures that transient network issues do not cause unnecessary switchovers .
NEW QUESTION # 35
Four routers run IS-IS and have established adjacencies. The area IDs and router levels are marked in the following figure. R1 and R2 are connected through a PPP link, and R3 is the DIS. Which of the following statements are true?
- A. R3 periodically sends CSNPs to implement Level-2 LSDB synchronization.
- B. If R2 sends a Level-2 LSP, R3 needs to send a PSNP for acknowledgment.
- C. R2 sends an LSP to R3 and R4 in unicast mode.
- D. If R1 sends an LSP, R2 needs to send a PSNP for acknowledgment.
Answer: A,D
Explanation:
R3, as the DIS in the Level-2 domain, periodically sends Complete Sequence Number Protocol Data Units (CSNPs) to ensure LSDB synchronization among Level-2 routers.
R1 and R2 are in a Level-1 domain, and IS-IS requires the receiving router (R2) to acknowledge an LSP from R1 by sending a Partial Sequence Number Protocol Data Unit (PSNP).
IS-IS LSPs in a broadcast network are sent using multicast, not unicast, making option C incorrect.
For Level-2 LSPs, acknowledgments are not provided using PSNP by R3; CSNPs are sufficient for synchronization .
NEW QUESTION # 36
Which of the following statements regarding the stateful inspection firewall is true?
- A. Because UDP is a connectionless protocol, so the stateful inspection firewall cannot match UDP packets with the status table.
- B. The stateful inspection firewall needs to match the rules for each incoming packet.
- C. The stateful inspection firewall only needs to match the first data packet against a rule, and the subsequent packets of the connection are matched directly in the state table.
- D. When the stateful inspection firewall checks packets, packets of one same connection are not correlated.
Answer: C
Explanation:
A stateful inspection firewall tracks the state of network connections and only matches the initial packet against its rule set. Subsequent packets in the same connection are matched in the state table. Contrary to this, UDP packets can be inspected by correlating them with connection states, and packets in a single connection are always correlated .
NEW QUESTION # 37
Which of the following attacks is not the network layer attack?
- A. ARP spoofing attack
- B. IP spoofing attack
- C. ICMP attack
- D. Smurf attack
Answer: A
Explanation:
ARP spoofing is a Layer 2 attack, as it targets ARP tables in switches or end devices. All other attacks, including IP spoofing, ICMP attacks, and Smurf attacks, are network layer (Layer 3) attacks .
NEW QUESTION # 38
Preferences of routing protocols determine the sequence In which a router selects a route among routes to the same destination /earned through different routing protocols.
- A. FALSE
- B. TRUE
Answer: A
NEW QUESTION # 39
In BGP, Notification messages are used to request peers to resend routing information after routing policies are changed.
- A. FALSE
- B. TRUE
Answer: A
Explanation:
Notification Message Purpose
* BGP Notification messages are used to report errors or terminate a connection. They do not request peers to resend routing information after routing policies are changed.
* Routing updates following policy changes require manual resynchronization, not Notification messages.
HCIP-Datacom-Core Reference
* The purpose and usage of Notification messages are discussed in the BGP operation chapters.
NEW QUESTION # 40
Which of the following is the default interval at which the DIS on a broadcast IS_IS network sends CSNPs.
- A. 3.3
- B. 0
- C. 1
- D. 2
Answer: B
Explanation:
The Designated Intermediate System (DIS) in an IS-IS broadcast network sends Complete Sequence Number PDUs (CSNPs) at a default interval of 30 seconds. This interval ensures periodic synchronization of the Link State Database (LSDB) among IS-IS neighbors .
NEW QUESTION # 41
Which of the following attributes must be carried when BGP sends route update messages?
- A. Next_Hop
- B. MED
- C. Local_Preference
- D. AS_Path
Answer: A,D
Explanation:
* Mandatory BGP Attributes
* Next_Hop: Specifies the next hop to reach the destination.
* AS_Path: Lists the autonomous systems traversed, crucial for loop prevention and route selection.
* Optional Attributes
* MED (Multi-Exit Discriminator) and Local_Preference are optional attributes that aid in route preference but are not mandatory.
* HCIP-Datacom-Core Reference
* BGP attribute behavior and classifications are detailed in BGP path selection principles.
NEW QUESTION # 42
BFD control packets are encapsulated in UDP packets for transmission. What is the destination port number of multi-hop BFD control packets?
- A. 0
- B. 1
- C. 2
- D. 3
Answer: D
NEW QUESTION # 43
When receiving a packet that does not match any session table entry, the firewall discards the packet to prevent external attacks and ensure internal information security.
- A. FALSE
- B. TRUE
Answer: B
Explanation:
When a Huawei firewall receives a packet that does not match any existing session table entry, it discards the packet. This is part of the default firewall policy, which ensures that unrecognized traffic is treated as a potential security risk and blocked. This behavior is vital for preventing unauthorized access and mitigating external attacks. The feature aligns with Huawei's default security strategies as detailed in their firewall operation manuals .
NEW QUESTION # 44
IGMPV3 not only supports IGMPv1 General Query and IGMPv2 Group-Specific Query, and also IGMPv3 Source/Group-Specific Query.
- A. FALSE
- B. TRUE
Answer: B
NEW QUESTION # 45
On the network shown in the following figure, the management VLAN is VLAN 10, and the AP is configured to obtain an IP address on the network segment 10.1.1.0/24 through DHCP. The AP, AC, and AR function as the DHCP client, DHCP relay agent, and DHCP server, respectively. Which of the following configurations for the DHCP relay agent and DHCP server are correct?
- A. [AR] ip pool AP
[AR-ip-pool-AP] network 172.21.1.0 mask 24
[AR-ip-pool-AP] gateway-list 172.21.1.2
[AR-ip-pool-AP] excluded-ip-address 172.21.1.1
[AR-ip-pool-AP] quit
[AR] interface GigabitEthernet 0/0/1
[AR-GigabitEthernetO/0/1] dhcp select global
[AR-GigabitEthernetO/0/1] quit
[AR] ip route-static 10.1.1.0 255.255.255.0 172.21.1.1 - B. [AC] dhcp server group AP
[AC-dhcp-server-group-AP] dhcp-server 10.1.1.2
[AC-dhcp-server-group-AP] quit
[AC] interface Vlanif 10
[AC-Vlanif 10] dhcp select relay
[AC-Vlanif 10] dhcp relay server-select AP
[AC-VlaniflO] quit - C. [AC] dhcp server group AP
[AC-dhcp-server-group-AP] dhcp-server 172.21.1.2
[AC-dhcp-server-group-AP] quit
[AC] interface Vlanif 10
[AC-Vlanif 10] dhcp select relay
[AC-Vlanif 10] dhcp relay server-select AP
[AC-Vlanif 10] quit - D. [AR] ip pool AP
[AR-ip-pool-AP] network 10.1.1.0 mask 24
[AR-ip-pool-AP] gateway-list 10.1.1.2
[AR-ip-pool-AP] excluded-ip-address 10.1.1.1
[AR-ip-pool-AP] quit
[AR] interface GigabitEthernet 0/0/1
[AR-GigabitEthernetO/O/1] dhcp select global
[AR-GigabitEthernet0/0/l] quit
[AR] ip route-static 10.1.1.0 255.255.255.0 172.21.1.1
Answer: C,D
Explanation:
Option A correctly configures the DHCP relay agent (AC) to forward requests to the DHCP server using VLAN 10.Option B correctly configures the DHCP server (AR) with the correct IP pool (10.1.1.0/24), gateway, and excluded IP addresses. The static route to 10.1.1.0 through 172.21.1.1 ensures proper routing .
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NEW QUESTION # 46
Compared with STP, RSTP defines the different port states. Which of the following statements regarding discarding and learning states are true?
- A. The port In discarding or learning state does not forward data frames.
- B. The port In learning stole docs not learn MAC addresses table.
- C. The port in discarding state does not learn MAC addresses table.
- D. The port in discarding or learning state does not learn MAC addresses
Answer: D
NEW QUESTION # 47
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Huawei H12-821_V1.0 exam consists of 60 multiple-choice questions, and candidates have 90 minutes to complete the test. H12-821_V1.0 exam is available in both English and Chinese and can be taken online or in-person at a designated testing center. Upon passing the exam, candidates will receive the HCIP-Datacom-Core Technology V1.0 certification, which is recognized by many leading IT organizations and companies around the world.
Passing the H12-821_V1.0 certification exam demonstrates that a candidate has the necessary expertise to plan, design, and deploy core network technologies using Huawei products and solutions. It also provides an opportunity for professionals to enhance their career prospects and increase their earning potential.
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